Envelope



Patented `lune 20, 1939 ENVELOPE Milton Kahn, Long Island City, N. Y., assignor to Novelart Mfg. Co., New York, N. Y., a firm Application June 28, 1938, Serial No. 216,221

1 Claim.

Another object is to provide an envelope of the above type having improved means for the concealment of its adhesive coa-ts prior to the normal utilization of the envelope.

A further object is to provide an envelope of 'the above type having improved means to prevent contact of its adhesive coats, when its sealing ap is folded in the packing of the envelopes.

A still further object is to provide an envelope, which, while embodying the aforesaid advantages, Will posses an outward appearance resembling the normal letter envelope.

Other objects and advantages will hereinafter appear.

In the accompanying drawing,-

Fig. 1 is a rear view elevation of the envelope of this invention, as it appears when in normal state, or prior'to utilization and sealing.

Fig. 2 is a transverse-sectionall end elevation of the envelope shown in Fig. 1. v

Fig. 3 is-a view similar to Fig. 1, but showing the envelope as it appears when in completely sealed state.

Fig. 4 is a transverse-sectional end elevation of the envelope, taken on the line 4--4 of Fig. 3.

The letter envelope I comprises a usual addressing front wall 2, a rear wall 3`flrmly glued to end flaps I of the former wall, and a sealing flap 5 forming part of the wall 2 which folds over the rear wall 3. In the rear wall 3 is formed a slot 6, and upon the undersurface 1 of said wall is located a reinforcing tab 8 having its mrgins 9- glued to said undersurface, with the unglued area II) of the tab facing the undersurface I and slot 6. Upon the area I0 is provided a coating II of dry adhesive substance of a type which, whether moistened or unmois'tened, will not stick or adsorted to, such as a solution of para rubber in gasolene, or any other known material which will carry out a similar function. Upon the undersurface I2 of the closing flap 5 is provided a similar area I3 of similar dry adhesive coating, whereby, as in the normal letter envelope, the

said flap coating appears concealed, as is also the coating II borne by tab 8.

When it is desired to utilize and seal the envelope, the leading portion of the flap 5 is passed through the slot 6 to a position underneath the rear wall 3, and between said wall and the tab 8, so that its coating I3 is in registry with the coating II of the latter, as clearly illustrated in Figs. 3, 4, the former figure being presented with paper portions as torn away to facilitate the clarification. Upon then applying pressure against the rear wall 3 and upon the flap 5 the latter adheres `firmly tothe tab 8, through the action of the dry adhering coatings I I, I3, whereby an efficient sealing of the envelope is effected. It will be noted that by virtue of the foregoing provisions of this envelope, not only will there be no danger of its sticking toy any other paper or other envelope material vin the packing of the envelopes, but its coatings I I,. I3 will be both normally concealed, to obviate exposure, catching of dust, dirt, or other matter, or causing injury to the dry adhering coatings, and, while providing inherently ecient sealing means Ifor the envelope, the appearance of the latter will at the same time resemble that of a normal letter envelope, which advantage is of utmost importance to this type of article.

Having thus described my invention, I claim:

A dry adhering envelope having the combination of a front wall', a rear wall, a closing ap forming part of said front wall folding over said rear wall, said rear wall having a slot, a reenforcing tab having its margin secured to the undersurface of said rear wall, the unsecured area of said tab facing said slot and undersurface of said rear wall having a dry adhering coat, the undersurface of said flap having a dry adhering coat, and said flap being adapted to pass its leading portion through said slot to bring its coat into registry with said other coat.

MILTON KAHN. 

